Pipeline ancillaries > Air vents
AV13 is a Spirax Sarco brass balanced-pressure thermostatic air vent for steam systems, used at high points where air and other non-condensable gases need to be removed.
Quick facts
AV13 is a model-level route inside air vents and air eliminators. It is useful when the specification already names AV13, or when a compact brass thermostatic air vent is being checked for a steam main or equipment high point.
Available product material identifies AV13 as a maintainable balanced-pressure thermostatic air vent for steam systems. It has a brass body, angle connection, BSP or NPT threaded connections, PN16 design condition and a maximum operating pressure of 13 bar g.
The documented size range covers 3/8", 1/2" and 3/4". The selectable complete-unit rows on this page focus on 1/2" and 3/4", so final replacement should confirm the installed connection and duty.
AV13 selection is usually a model-specific air removal decision, with pressure, connection size and installation position checked before ordering.
Return to the air vents range when AV13 needs to be compared with other venting routes for steam, liquid systems or clean steam.
Use pipeline ancillaries when air removal is part of a wider line-protection decision involving separators, strainers or check valves.
Review air-venting guidance when warm-up time, air pockets or vent position still need to be confirmed.
